setLocations

Can point to classic properties files or to XML files
that follow JDK 1.5's properties XML format.

Note: Properties defined in later files will override
properties defined earlier files, in case of overlapping keys.
Hence, make sure that the most specific files are the last
ones in the given list of locations.

setLocalOverride

public void setLocalOverride(boolean localOverride)

Set whether local properties override properties from files.

Default is "false": Properties from files override local defaults.
Can be switched to "true" to let local properties override defaults
from files.

setIgnoreResourceNotFound

public void setIgnoreResourceNotFound(boolean ignoreResourceNotFound)

Set if failure to find the property resource should be ignored.

"true" is appropriate if the properties file is completely optional.
Default is "false".